Tesla 406U Vltava

One of the "Rytmus series" radios. It has one more short wave band and is equipped with a turntable input. These radios can run on AC or DC mains. The filaments of all the tubes are connected in series and supplied directly from the mains. The radio was lighter and cheaper thanks to the missing mains transformer. One of the drawbacks was the fact that the chassis was directly connected to the mains. All metal parts of the chassis have to be inaccessible for touch, all inputs and outputs have to be electrically insulated. The turntable input is insulated with a small transformer. Its manufacture could not be provided in sufficient numbers, so some of these radios do not have it. The turntable connector and switch were put in place, but the input does not work.